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Author Question: The number of first-year students who will decide to live in dormitories is a binomial random ... (Read 89 times)

TFauchery

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on: Jul 24, 2018
The number of first-year students who will decide to live in dormitories is a binomial random variable X with n = 1000 and p = 0.50 . Use the normal approximation with continuity correction to approximate the probability that X will be no more than 490, P(X  490).
 a. 0.2743
  b. 0.2709
  c. 0.7291
  d. 0.7357

Question 2

A random sample of 250 third graders scored an average of 3.2 on a standardized reading test. The standard deviation was 0.95 . What is the standard error of the sample mean?
 a. 0.95
  b. 0.202
  c. 0.0038
  d. 0.060


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cswans24

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Reply #1 on: Jul 24, 2018
Answer to Question 1

A

Answer to Question 2

D


TFauchery

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Reply 2 on: Jul 24, 2018
Gracias!

juliaf

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Reply 3 on: Yesterday
Wow, this really help

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